During platelet plug formation,
A)platelets stick to the exposed collagen fibers of injured vessels.
B)activated platelets release fibrinogen.
C)thrombin is released from endothelial cells.
D)vitamin K production increases.
E)platelets multiply.

Question

Quizplus · Accepted Answer

Platelets are activated at the site of injury and start sticking to the exposed collagen fibers of the damaged blood vessel walls. This initiates platelet plug formation. Option B is incorrect as activated platelets release von Willebrand factor and several other substances, but not fibrinogen. Option C is incorrect as thrombin is not released from endothelial cells but is generated from prothrombin by the action of coagulation factors. Option D is incorrect as vitamin K production does not directly affect platelet plug formation. Option E is incorrect as platelets do not multiply in significant numbers during platelet plug formation.

During Platelet Plug Formation